The past two decades have been a period of far-reaching policy experimentation in state financing of higher education. Between 1986 and 1999, 21 states adopted prepaid college tuition plans. Thirty-one states adopted some form of college savings plan. Both kinds of policies were designed to enhance the affordability of higher education during a time of growing concern about college costs. Using...

Memory-based decision tree algorithms, such as C4.5 and its derivatives, do not support scalability well as they depend on the available memory. If the dataset being classified is very large, the efficiency also suffers as a large size of cases has to be traversed many times. Fortunately, ObjectRelational DBMSes offer features (such as indexing, query optimizer, improved SQL and stored procedur...

This paper analyses price elasticities in the Austrian market for mobile telecommunications services using data on firm specific tariffs in the period between January 1998 and March 2002. Dynamic panel data regressions are used to estimate short-run and long-run demand elasticities for business customers and for private consumers with both postpaid contracts and prepaid cards. We find that busi...

Trio is a new kind of database system that supports data, uncertainty, and lineage in a fully integrated manner. The first Trio prototype, dubbed Trio-One, is built on top of a conventional DBMS using data and query translation techniques together with a small number of stored procedures. This paper describes Trio-One’s translation scheme and system architecture, showing how it efficiently and ...

Mathematical models for climate studies are treated as a coupling link between physical and computational models. These models are characterized by the fact that small-scale phenomena innuence the large-scale properties of the modelling system, yet the former cannot be extracted from the latter using available hardware and computational procedures. Climate systems belong to the class of systems...

Modern stored program control (SPC) digital exchanges represent an opportunity to enhance traditional telecommunications services by o ering subscribers ner control over the way their calls are managed. Thus far, the predominant approach (Intelligent Networks) has involved making highly specialised, well-de ned functions available as services. These tend to exhibit a low degree of con gurabilit...

Modern stored program control SPC digital exchanges represent an opportunity to enhance traditional telecommunications services by o ering subscribers ner control over the way their calls are managed Thus far the predominant approach Intelligent Networks has involved making highly specialised well de ned functions available as services These tend to exhibit a low degree of con gurability and of...

effect of controlled atmospheres (cas) at various concentrations of co2, n2 and o2 on the lethal times of tribolium castaneum and trogoderma granarium was investigated at 20 and 30 ºc. experiments were performed using a recirculatory multi-flask apparatus. the results revealed that, the shortest times (0.1, 0.3 and 0.9 day for adults, larvae and pupae, respectively) required to obtain 50% morta...

Considering the influence of the transient process of transient electromagnetic receiving coil on the early signals detection of the secondary field, as well as the great change and the various decay rates in different periods of the secondary field signals, which will affect the secondary field signal collection, we aim at designing a new receiver with the variable stored program control recei...